Multistrand spiral fabric



Aug. 24, 1937.

C. E. PINK MULTI STRAND SPIRAL FABRIC Filed June 24, 1935 Chr'e/zceE. pmiy Patented Aug. 24, 1937 Clarence E. Pink, Cambridge, Md. Application June 24, 1935, Serial No. 28,197 4 Claims. (Cl. 245-6) The object of the invention is to provide a spiral fabric of the multi-strand form similar to that shown in Patent No. 1,833,260 of November 24, 1931, but in which there is a greater degree of flexibility than in the fabric of the patent; and to provide a fabric of the kind indicated in which closeness of weave is secured, comparatively great tensile strength and a simplicity of construction which makes for comparatively cheap manufac-. 1;, ture.

With this object in view, the invention consists in a construction and combination of parts, of which a preferred embodiment is illustrated in the accompanying drawing, wherein:

Figure 1 is a plan view of the fabric constructed in accordance with the invention.

Figure 2 is a similar view of one of the fabric sections.

Figure 3 is a collective plan view of the several 23 elements comprising a section.

Figure 4 is a sectional view on the plane indicated by the line 44 of Figure 1.

The improved fabric is made up of a plurality of coupled sections l 0, of which each is composed of a plurality of spiral strands, as, for example,

strands comprised in any one section may be two or more in number, and the strands are wound so that successive convolutions are pitched at a comparatively great distance apart. This arrangement provides for threading the one strand into the other, so that the convolutions of as sembledstrands are arranged in intercurrent relation and the pitch of the convolutions of an asv sembled section reduced to one-half, one-third and so forth of the pitch of a single strand, depending on how many strands are comprised in a section. The extremities of the assembled strands are secured to the extremities of the cross rod M, as indicated at IS, in any acceptable manner. as by welding and the like.

The strands II and I2 are so wound as to make the convolutions of generally oval form, as illustrated in Figure 4, the major axes of the convolutions being disposed in the direction of the length of the woven fabric. The cross rods 14 I thus lie in the ends of the loops formed by the convolutions of the strands, the cross rod of any section being engaged freely with the loops of the convolutions of an adjacent section.

In the weaving of the fabric, the convolutions of the strands l2 of each section are looped together and the strands ll of the several sections are similarly connected, the cross rods being lnserted through the sections between the loops of the strands II and I2, and a cross rod It. The

REISSUEE) axes on which the sections swing relative to each other. ,While each cross rod is rigidly connected to the strands of the section in which it iscomprised, it nevertheless provides the swinging connection for the next adjacent section.

Since the several sections thus may readily 5 swing relative to each other, a high degree of flexibility in the fabric is provided with the close mesh that it is possible to secure with comparatively coarse wire from this particular arrangement of weaving.

The invention having been described, what is claimed as new and useful. is:

1. A spiral fabric comprising connected sections of which each includes a plurality of spiral 15 strands'threaded one into the other and a cross rod inserted through the convolutions of the strands in contact with the inner peripheries thereof at one point, the cross rods of each section being terminally secured to the extremities of the strands of that section, the convolutions of the strands of one section being interlooped with the convolutions of the strands ofthe adjacent section but around the cross rod thereof.

2. A spiral fabric comprising connected sections of which each includes a plurality of spiral 25 strands threaded one into the other, the convolutions of the strands being of generally oval form,

a cross rod inserted through the convolutions of the strands in contact with the inner peripheries thereof at one end of the major axes of the con- 30 volutions, the cross rods of each section being terminally secured to the extremities of the strands of that section, the convolutions of the strands of one section being interlooped with the convolutions of the strands of the adjacent section but around the cross rods thereof.

3. A spiral fabric comprising spiral strands having their convolutions comparatively widely spaced, one strand being threaded into another to dispose its. convolutions in intercurrent relation with the convolutions of the first, the extremities of the threadedly related strandsbeing secured together and adjacent strands having their convolutions interlooped. 45

4. A spiral fabric comprising spiral strands having theirconvolutions comparatively widely spaced, one strand being threaded into another to dispose its convolutions in intercurrent relation with the convolutions of the first, and cross rods extending through the convolutions of the threadedly related strands and terminally secured to the extremities of the latter, adjacent strands having their convolutions interlooped around the cross rods.

' CLARENCE I. PINK. 

